Robert louthee nbill



@wat litter.

To all whom 'it may? concern;- j

"Be t known that I,-ROBER:|: LOUTHEE N EILL, of l Paterson, in the county `of Bassaie and State of New Jersey, have invented anew and improved Boilerfull, clear, and exact description thereof, which will enable others skilled in the art toV make and use the ing forminggpart` of this specification. l

Figures 1 and'2 are central sections of my improved Fjgure 3'is a back-end viewof thesame.`

aparts. l l l u This invention has for its object to economize boilerplugs, which are, during the testing of the plates, used of the tubes.

thatpurpose, and driven into the holes of theboile'rplates.'v But,`be`sides beingfar from reliable, these i wooden' plugs i were made. useless by one application, heingtorn by the sharpedges of the metal, and therehy'unfit for further us. y l i Mynvention consists in constructing an adjustable plug, which will. notbe injured by ordinary wear, and

after use.

. Band O.

A 4is a screw, of suliicient strength, with ahead or handle, `a, at its outer end. l l

Plug;l and I doherebydeclare that'the following is a' satne,`ref`erence being had to the accompanying drawthe boiler-plate D, as shown in iig. 1. l

' The disk B may be placed against a packing-disk,

l vSimilar letters ci'v referenceqindicatecorresponding to close the holesthat are provided for the recept-ion Heretofore conical wooden vplugs were ,employed for.

which can be readily ,appliedlan'd removed `before and `Myplugiscomposed of three. principal pieces, A,

3 Bis a metal disk, made of 'metalVv` or other suitable ROBERT LourliiuaV NEILL, 'or PATE-usos, NEW JERSEY.`

Laempaan'r N0. 1o4,'759, dated .Eme 2s, 1870.

BAOILER-TUBE PLUG. r

. l l *M i l. TheiSchedule referred to in-these Letters Patent and making part of :he a'ame.

material, fitted loosely upon the nou-threaded outer part of the screw, so that it can freely turn on the same.

, C is aplate screwed upon A.

The plate G is longer than the diameter of the hole' to beplugg'ed, but not aswide,.as seen in g. 3. It has ltwo shoulders, b b, formed ou it, they being so far apart'as to t snuglyagainst the edgesof the'hole in through the hole in the boiler, vas in iig. 2. .WhenV through, the plate is drawn against the inner face of* the boiler-plate, and the screw turned until the plates B C are both tightly pressed against the respective outer and inner faces of the said plate, as in'g. 1. rllhe hole is then securely plugged, and the boiler can be tested.` Afterward the plug can be removed, to open the hole for the reception of' the tubing.v

Having thus described my invention,

' I' claim as lnew and desire to secure by Letters' Patentj- Y i As an article of manufacture, au improved boilerplug, consisting 'of screw A a, loosely-fitted metal disk B, and the elongated plate 'O b b, all combined with packing rubber disk c and intervening wooden disk d, 

